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in an AP first term and common difference are equal.the product of the first and 9th term is 144.what is the common difference of the sequence? |
| Given that a = d a * a9 = 144 a(a+8d) = 144 a* 9d = 144 9a2 = 144 a2 = 144/9 a = 12/3 Since a = d, d = 12/3 |
